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Old 02-02-21, 11:39 AM   #10
jeff5may
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Chemical energy storage is somewhat less dense than the source. Megajoules per kilogram is the metric. As expected, burning liquified petroleum gas is pretty dense, around 50. Liion batteries come in around 0.8 on the same scale. But you have to have a source to store. And the 2LOT complicates things further, you cannot break even. Rube Goldberg would be proud.

PV solar is so less dense, they had to invent metrics for comparison. The going rate is 25 equivalent watts per square meter. This is with 10% pv panels. Moral of the story is that if you're jimmy carter, you can power a tiny town for the low price of (he doesn't have to tell you) money. In effect, you're replacing a continuous duty burner of a certain size with a PV energy concentrating storage system capable of less service at higher expense. YOLO, it's just money...

The best way to use your dehumidifier scale phase change contraption is to integrate it into your window HRV. Put each heat exchanger at the downwind end and reflect the heat outdoors or indoors, depending on the season. 300 CFM per ton of refrigeration, or 10 watts per CFM of heat transfer, is the standard target indoors. This setup beats the above solar concentrating system described above by a factor of COP times ten. All day and all night, without batteries. Off grid? No problem. Just run it off the power inverter.

If this post sounds scattered, it is fashioned to reflect this thread. If it were me, I would probably post up 4 or 5 separate topics and keep each topic more focused. A combined system is only as strong as its weakest component.

Last edited by jeff5may; 02-02-21 at 12:16 PM.. Reason: Info
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